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Amazon Echo is a wireless speaker and voice command device from Amazon.com. The device consists of a 9.25-inch (23.5 cm) tall cylinder speaker with a seven-piece microphone array. The device responds to the name "Alexa"; this "wake word" can be changed by the user (to one other choice at present: "Amazon").〔(【引用サイトリンク】title=Amazon.com Help: Set Up Your Amazon Echo )〕 The device is capable of voice interaction, music playback, making to-do lists, set alarms, stream podcasts, play audiobooks, provide weather, traffic and other real time information. It can also control several smart devices. Amazon had been developing Echo inside its Lab126 offices in Silicon Valley and Cambridge, Mass., for at least four years. The device, codenamed 'Doppler' or 'Project D', was part of Amazon’s first attempts to expand its device portfolio beyond the original Kindle Ereader.〔 The Echo, (initially limited to Amazon Prime members or by invitation) became widely available on June 23, 2015.〔http://www.androidcentral.com/amazon-echo-now-available-everyone-buy-17999-shipments-start-july-14〕 Additionally the service behind it (Alexa Voice Service) is now available to be added to other devices and other companies’ devices and services are encouraged to connect to it (using the Alexa Skills Kit). 〔http://techcrunch.com/2015/06/25/amazon-unbundles-alexa-virtual-assistant-from-echo-with-new-dev-tools/〕 ==Cloud-based processing== Amazon Echo runs on Amazon Web Services. In the default mode the device continuously listens to all speech, monitoring for the wake word to be spoken. The device also comes with a manually and voice-activated remote control which can be used in lieu of the 'wake word'. Echo's microphones can be manually disabled by pressing a mute button to turn off the audio processing circuit.〔 Echo requires a Wi-Fi internet connection in order to work. Echo's voice recognition capability is based on Amazon Web Services and the Amazon common voice platform it acquired from Yap,〔(【引用サイトリンク】title=Star Perfomers: Amazon's on Fire )〕 Evi, and IVONA,〔(【引用サイトリンク】title=Amazon Echo is an always-on personal assistant that is also a speaker. )〕 (a Polish-based specialist in voice technologies used in the Kindle Fire).〔(【引用サイトリンク】title=Amazon Gets Into Voice Recognition, Buys Ivona Software To Compete Against Apple’s Siri )〕 Echo performs well with a 'good' Internet connection (i.e., a connection with low latency) which minimizes processing time due to minimal communication round trips, streamable responses and geo-distributed service endpoints. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Amazon Echo」の詳細全文を読む スポンサード リンク
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